Thames Valley Police is appealing for witnesses following an assault in Milton Keynes.
At around 10.10pm on Saturday 24 July, a member of staff was assaulted in The Moon Under Water.
The victim was punched in the face by the offender, but did not require hospital treatment.
The offender is described as white, approximately 6ft 1ins tall, of medium build and aged in his mid thirties with a large brown beard and short brown hair.
He was wearing a white vest and grey shorts with a white t-shirt tucked into the waistband.
He also spoke with an Irish accent.
Investigating officer, Special Constable Ashton Taylor, based at Milton Keynes police station, said: “We are appealing for anyone who may have witnessed this incident to please come forward.
“From our enquiries so far, we also believe there may have been another victim to this incident and so we would appeal for them to get in touch too.
“Anyone with information can contact police by making a report online, or by calling 101, quoting reference 43210332909.
“Alternatively, if you wish to remain anonymous, you can contact the independent charity Crimestoppers on 0800 555 111.”